Run results for: scrollHeight vs getBoundingClientRect().height

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

scrollHeight

6.3M/s

getBoundingClientRect().height

1.6M/s

View exact numbers

Test name	Executions per second
✓ scrollHeight	6,314,777 Ops/sec
getBoundingClientRect().height	1,645,371 Ops/sec

HTML Preparation code:

<div id="el">
  <h2>Lorem ipsum dolor sit amet</h2>
</div>

Script Preparation code:

var el = document.getElementById("el");

Tests:

scrollHeight
const height = el.scrollHeight;
getBoundingClientRect().height
const height = el.getBoundingClientRect().height;